Battery-jar



(No Model.)

0. A. BROWN.

BATTERY JAR.

No. 373,334. Patented Nov. 15, 1887.

N. PUEKS. Moumm -n hw. Washington. n.c.

UNITED STATES PATENT OFFI E.

CHARLES ALVA BROWN, OF PORTLAND, MAINE.

BATTERY-JAR.

SPECIFICATION forming part of Letters Patent No. 373,334, dated November 15, 1887.

Application filed December 29, 1886. Serial No. 222,871. (No model.)

To aZZ whom it may concern:

Be it known that 1, CHARLES ALVA BROWN, a citizen of the United States, residing at Portland, in the county of Cumberland and State of Maine,haveinvented certain new and useful Improvements in Battery-Jars; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters and figures of reference marked thereon, which form a part of this specification.

Myinvcntion relates to cells or jars for electric batteries; and it consists in the forming or manufacture of such a battery-jar from wood or paper pulp, said jar being impregnated with a substance-such as coal-tar-which will withstand the action of acids and the other chemicals such as are used in batteries.

Hitherto battery-jars have been made of a variety of materials-such, for instance, as glass, hard rubber, porcelain, &c.; but in all jars hitherto made the material of which they were constructed has been brittle and easily destroyed, as in the case of glass, hard rubber,

- and porcelain, or it has been heavy and exicals used in batteries.

In the drawing the figure shows half-sectional view and half elevation of one of my battery-jars.

My jar is formedfrom wood or paper pulp on any suitable machine for the purpose. The

pulp jar is then impregnated with coal-tar,-

the jar being immersed in the heated tar,

By the porosity of thepulp it readily receives and retains the chemical-proof liquid with which it is soaked. The hot tar readily permeates the porous material and completely fills the cellular spaces. On drying, the oil of the tar oxidizes and hardens, producing'increased density and toughness of the jar and rendering itthoroughly proof against attack by ordinary battery-fluids.

I am aware that it has been heretofore proposed to coat the interior of wooden bottles with asphalt. in structure from mine, and would prove inefficient for battery purposes. The asphalt, being applied as a film to the interior of the jar, would be chilled immediately on application and could not penetrate the cellular spaces. In use the rubbing action of the electrodes, in case such a vessel were used as a battery-jar, would crack the lining and cause Such a product is very different it to scale off, exposing the naked wood to the decomposing influences of the acids.

I claim.-.

As a new article of manufacture, a batteryjar composed of pulp impregnated with coal tar.

In testimony whereof I afiix niysiguature'in presence of two witnesses.

CHARLES ALVA BROWN.

\Vitnesses:

ELGIN O. VERRILL, S. W. Runs. 

